//
//  MGVisitorView.swift
//  微博
//
//  Created by 陈明光 on 2019/11/9.
//  Copyright © 2019 陈明光. All rights reserved.
//

import UIKit
//访客视图
class MGVisitorView: UIView {
    
    //注册按钮
     lazy var registerButton: UIButton = UIButton.cz_textButton(
        "注册",
        fontSize: 16,
        normalColor: UIColor.orange,
        highlightedColor: UIColor.black,
        backgroundImageName: "common_button_white_disable")
    //登陆按钮
     lazy var loginButton: UIButton = UIButton.cz_textButton(
        "登陆",
        fontSize: 16,
        normalColor: UIColor.darkGray,
        highlightedColor: UIColor.black,
        backgroundImageName: "common_button_white_disable")
    
    //访客视图的信息字典（imageName / message）
    //如果是首页 imageName == ""
    var visitorInfo: [String: String]? {
        didSet{
            //1.取字典信息
            guard let imageName = visitorInfo?["imageName"],
                let message = visitorInfo?["message"] else {
                    return
            }
            //2.设置消息
            tipLabel.text = message
            
            //3.设置图像，首页不需要设置
            if imageName == "" {
                startAnimation()
                return
            }
            
            iconView.image = UIImage(named: imageName)
            
            //其他控制器的访客视图不需要显示小房子/遮照视图
            //isHidden隐藏
            houseIconView.isHidden = true
            maskIconView.isHidden = true
        }
    }
    
    
    //MARK: - 构造函数
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        setupUI()
    }
    
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    //旋转图标动画(首页)
    private func startAnimation(){
        let anim = CABasicAnimation(keyPath: "transform.rotation")
        //“M_PI”已弃用：请使用“Double.pi”或“.pi”获取正确类型的值并避免强制转换。
        anim.toValue = 2 * Double.pi
        anim.repeatCount = MAXFLOAT
        anim.duration = 15
        
        //动画完成不删除，如果 iconView 被释放，动画会一起销毁
        //在设置连续播放的动画非常有用
        anim.isRemovedOnCompletion = false
        
        //将动画添加图层
        iconView.layer.add(anim, forKey: nil)
    }
    
    //MARK: 私有控件
    //懒加载属性只有调用 UIKit 控件的指定构造函数，其他都需要使用类型
    //图像视图
    private lazy var iconView:UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_smallicon"))
    
    //遮照图片 - 不要使用maskView
    private lazy var maskIconView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_mask_smallicon"))
    
    //小房子
    private lazy var houseIconView:UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_house"))
    
    //提示表情
    private lazy var tipLabel:UILabel = UILabel.cz_label(
        withText: "关注一些人，回这里看看有什么惊喜关注一些人，回这里看看有什么惊喜",
        fontSize: 14,
        color: UIColor.darkGray)
    
    
}

//MARK: 设置界面
extension MGVisitorView{
    func setupUI(){
        //0.在开发的时候，如果能够使用颜色，就不要使用图像，颜色的效率会更高
        //cz_color(withHex: 0xEDEDED)：表示下面的颜色和0xEDEDED一样
        backgroundColor = UIColor.cz_color(withHex: 0xEDEDED)
        
        //1.添加控件
        addSubview(iconView)
        addSubview(maskIconView)
        addSubview(houseIconView)
        addSubview(tipLabel)
        addSubview(registerButton)
        addSubview(loginButton)
        
        //文本居中
        tipLabel.textAlignment = .center
        
        //2.取消autoresizing
        for v in subviews {
            v.translatesAutoresizingMaskIntoConstraints = false
        }
        
        //3.自动布局
        let margin:CGFloat = 20.0
        
        /*
         自动布局核心公式"view1.attr1 = view2.attr2 * multiplier + constant"
         任何‘视图‘的某一个’属性‘等于另外一个’视图‘的’属性‘乘以一个’乘积‘，在加上一个’常数‘
         NSLayoutConstraint(item: 视图,
         attribute: 约束属性,
         relatedBy: 约束关系,
         toItem: 参照视图,
         attribute: 参照属性,
         multiplier: 乘积,
         constant: 约束数值))
         */
        //toItem: 参照视图
        //1.图像视图
        addConstraint(NSLayoutConstraint(item: iconView,
                                         attribute: .centerX,
                                         relatedBy: .equal,
                                         toItem: self,
                                         attribute: .centerX,
                                         multiplier: 1.0,
                                         constant: 0))
        addConstraint(NSLayoutConstraint(item: iconView,
                                         attribute: .centerY,
                                         relatedBy: .equal,
                                         toItem: self,
                                         attribute: .centerY,
                                         multiplier: 1.0,
                                         constant: -60))
        //2.小房子
        addConstraint(NSLayoutConstraint(item: houseIconView,
                                         attribute: .centerX,
                                         relatedBy: .equal,
                                         toItem: iconView,
                                         attribute: .centerX,
                                         multiplier: 1.0,
                                         constant: 0))
        addConstraint(NSLayoutConstraint(item: houseIconView,
                                         attribute: .centerY,
                                         relatedBy: .equal,
                                         toItem: iconView,
                                         attribute: .centerY,
                                         multiplier: 1.0,
                                         constant: 0))
        //3.提示标签
        addConstraint(NSLayoutConstraint(item: tipLabel,
                                         attribute: .centerX,
                                         relatedBy: .equal,
                                         toItem: self,
                                         attribute: .centerX,
                                         multiplier: 1.0,
                                         constant: 0))
        addConstraint(NSLayoutConstraint(item: tipLabel,
                                         attribute: .top,
                                         relatedBy: .equal,
                                         toItem: iconView,
                                         attribute: .bottom,
                                         multiplier: 1.0,
                                         constant: margin))
        addConstraint(NSLayoutConstraint(item: tipLabel,
                                         attribute: .width,
                                         relatedBy: .equal,
                                         toItem: nil,
                                         attribute: .notAnAttribute,
                                         multiplier: 1.0,
                                         constant: 236))
        //4.注册按钮
        addConstraint(NSLayoutConstraint(item: registerButton,
                                         attribute: .left,
                                         relatedBy: .equal,
                                         toItem: tipLabel,
                                         attribute: .left,
                                         multiplier: 1.0,
                                         constant: 0))
        addConstraint(NSLayoutConstraint(item: registerButton,
                                         attribute: .top,
                                         relatedBy: .equal,
                                         toItem: tipLabel,
                                         attribute: .bottom,
                                         multiplier: 1.0,
                                         constant: margin))
        addConstraint(NSLayoutConstraint(item: registerButton,
                                         attribute: .width,
                                         relatedBy: .equal,
                                         toItem: nil,
                                         attribute: .notAnAttribute,
                                         multiplier: 1.0,
                                         constant: 100))
        //4.登陆按钮
        addConstraint(NSLayoutConstraint(item: loginButton,
                                         attribute: .right,
                                         relatedBy: .equal,
                                         toItem: tipLabel,
                                         attribute: .right,
                                         multiplier: 1.0,
                                         constant: 0))
        addConstraint(NSLayoutConstraint(item: loginButton,
                                         attribute: .top,
                                         relatedBy: .equal,
                                         toItem: tipLabel,
                                         attribute: .bottom,
                                         multiplier: 1.0,
                                         constant: margin))
        addConstraint(NSLayoutConstraint(item: loginButton,
                                         attribute: .width,
                                         relatedBy: .equal,
                                         toItem: registerButton,
                                         attribute: .width,
                                         multiplier: 1.0,
                                         constant: 0))
        //6.遮照图像
        //views定义 VFL 中的控件名称和实际名称影射关系
        //metrics: 定义 VFL 中() 指定的常数影射关系
        let viewDict = ["maskIconView": maskIconView,
                        "registerButton": registerButton]
        let maetrics = ["spacing": -20]
        
        addConstraints(NSLayoutConstraint.constraints(
            withVisualFormat: "H:|-0-[maskIconView]-0-|",
            options: [],
            metrics: nil,
            views: viewDict))
        addConstraints(NSLayoutConstraint.constraints(
            withVisualFormat: "V:|-0-[maskIconView]-(spacing)-[registerButton]",
            options: [],
            metrics: maetrics,
            views: viewDict))
    }
}
